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Polyester-Imide Series Enamelled Wirer For Oil-Transformer

Polyester-Imide Series Enamelled Wirer For Oil-Transformer has the characteristics of high temperature resistance, good mechanical properties, excellent insulation properties and environmental sensitivity to meet the requirements of high-tech development in aerospace, microelectronics, electrical, chemical, energy technology and other high-tech developments.

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Polyimide insulation improves the service life at high temperatures. At 250¡ãC, the service life of polyimide enameled wire is 10,000h, while that of silicone enameled wire is only 200-600h. Polyimide has outstanding softening and breakdown resistance. The enameled wire will not be broken down even if the metal wire damages the paint film at 310¡ãC, while the softening and breakdown temperature of polyester enameled wire is only 200-220¡ãC. The polyimide alcohol film has very good thermal shock resistance. The enameled wire is continuously wound on a rod of equal diameter and placed immediately at 400¡ãC. The insulation does not break. If the temperature is as low as -95¡ãC, it Sudden bending, the paint film does not crack, so polyimide enameled wire has good elasticity, after long-term aging at 250 ¡æ and 300 ¡æ, it will not lose its harsh bending resistance.

Polyimide has these excellent properties and is also suitable for making enameled rectangular wires. Since the rectangular wires are used to prepare large-scale motor windings, the edges of the enameled wires must be bent, and during operation, due to centrifugal force, insulation between turns will occur. With huge compressive stress, the insulation must not be punctured or damaged.

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